Procurar Cano De Aço, Tubo De Aço, Tubo De Aço Galvanizado no diretório Industry Directory, fabricante / fornecedor / Fábrica confiável a partir de China
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| Tipo de pagamento: | L/C, T/T |
|---|---|
| Tempo de entrega: | 1 dias |
Modelo: YB-post 2
| Table of Comparison between Fushunda Steel Standard and International Standard | |||||||
| National Standard | Enterprise Standard | Comparison Results | |||||
| Welded Steel Pipe for Transportation of Low Pressure Fluid | Welded Pipe | ||||||
| GB/T 3091-2008 | Q/FSD 01-2002 | ||||||
| 1 | Outside Diameter of Steel Pipe | Outside Diameter of Steel Pipe, Tolerance of Outside Diameter | Better than National Standards | ||||
| Outside Diameter D/mm | Tolerance of Pipe Outside Diameter |
Tolerance of Pipe End Outside Diameter/mm | Outside Diameter D | 8" | ±0.60mm | ||
| D≤48.3 | ±0.5mm | 5"-6" | ±0.50mm | ||||
48.3| ±1.0% |
4" |
±0.40mm |
| ||||
168.3| ±0.75% |
-0.8~+2.4 |
3"-2 1/2" |
±0.30mm |
| |||
| D>508 | ±1.0% | -0.8~+3.0 | D≤2" | ±0.20mm | |||
| Tolerance of W.T. | 10% | Wall Thickness | 1.8-5.75mm | 5% | |||
| 2 | Length | Usual Length | Tolerance | Length | Usual Length | Tolerance | Better than National Standards |
| 4m-12m | -0~+20 | D≤2" | -0~+5 | ||||
| 2 1/2"≤D≤4" | -0~+10 | ||||||
| Multiple length: 5-10mm tolerance for each multiple length | -0~+20 | 5"≤D | -0~+15 | ||||
| Stecial Length | -0~+20 | ||||||
| 3 | Bending | Φ≤114.3mm | Straight for ordinary use or negotiate the bending | Bending | ≤1.5 | Better than National Standards | |
| Φ≤114.3mm | Smaller than 0.2% of full steel pipe | ||||||
| 4 | Pipe End | The two end faces of steel pipe should be vertical with axes of the steel pipe. No burr in the incising | Pipe End | The two end faces of steel pipe should be vertical with axes of the steel pipe. No burr in the incising | Equal to National Standards | ||
| ≥Φ114.3mm | Cutting tilt: no more than 3mm | ≥Φ114.3mm | Cutting tilt: no more than 3mm | ||||
| 5 | Weight | Ungalvanized steel pipe could be delivered according to its actual weight or theoretical weight. Galvanized steel pipe could also be delivered according to its actual weight or theoretical weight. Computation of the weight according to theoretical weight equation, and referring to the factor table of galvanized pipe. | Weight | Ungalvanized steel pipe could be delivered according to its actual weight or theoretical weight. Galvanized steel pipe could also be delivered according to its actual weight or theoretical weight. Computation of the weight according to theoretical weight equation, and referring to the factor table of galvanized pipe. | Equal to National Standards | ||
| 6 | Chemical Composition | Execute according to GB/T223, GB/T4336, GB/T2006 and GB/T20123 | Chemical Composition | Execute according to GB/T222, GB/T223, GB/T699, GB/T700, GB/T1591 and GB/T4336 | Better than National Standards | ||
| 7 | Mechanical Properties | Execute according to GB/T228, GB/T2795, GB/T244 and GB/T246 | Mechanical Properties | Execute according to GB/T228, GB/T2795, GB/T244 and GB/T246 | Equal to National Standards | ||
| 8 | Surface Quality of Steel Pipe | Internal and external surface of pipe should be slick. Folding crack, delamination and lap weld are not permitted. Other defects that no more than the negative deviance of wall thickness are permitted. Internal burr is allowed to exist. Steel pipe with >100mm, could be repaired for its defects and carry out water pressure experiment. Galvanized steel pipe should carry out homogenization experiment for its galvanization layer. Steel pipe sample should not turn red after 5 times of consecutive immersing in cupric sulfate solution (color of copper plating). There should be complete galvanized layer on both the internal and external surface of the pipe, and should not have the black spot and bubble that characterized the ungalvaniztion. Little coarse surface and existence of sectional zinc hump are allowed. |
Surface Quality of Steel Pipe | Steel pipe should not have defects such as crack, scar, folding, delamination, and lap weld etc. pull line, scoring, weld seam dislocation, scuffing not larger than the negative deviance of wall thickness and the trace of elimination skin of ferric oxide and burr are allowed. Internal burr is allowed to exist. Galvanized steel pipe should carry out homogenization experiment for its galvanization layer. Steel pipe sample should not turn red after 5 times of consecutive immersing in cupric sulfate solution (color of copper plating). There should be complete galvanized layer on both the internal and external surface of the pipe, and should not have the black spot and bubble that characterized the ungalvaniztion. Little coarse surface and existence of sectional zinc hump are allowed. |
Better than National Standards | ||
Grupo de Produto : Tubo / tubo de aço
